GCSE SCI Single Award PP March 2012 Higher Tier Module 2 Human Activity and Health 10526

7/28/2019 GCSE SCI Single Award PP March 2012 Higher Tier Module 2 Human Activity and Health 10526

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7470

71

Centre Number

Candidate Number

General Certificate of Secondary Education20112012

Science: Single Award (Modular)

Human Activity and HealthModule 2

Higher Tier [GSC22]

MONDAY 27 FEBRUARY 201211.00 am11.45 am

G S C 2 2

TIME

45 minutes.

INSTRUCTIONS TO CANDIDATES

Write your Centre Number and Candidate Number in the spacesprovided at the top of this page.Write your answers in the spaces provided in this question paper.

Answer all seven questions.

INFORMATION FOR CANDIDATES

The total mark for this paper is 45.Figures in brackets printed down the right-hand side of pagesindicate the marks awarded to each question or part question.

For Examinersuse only

QuestionNumber Marks

1

2

3

4

5

6

7

TotalMarks


2/12

7470 2 [Turn over

Examiner Only

Marks Remark1 (a) The following graph shows how the levels of antibody change in the

blood following a vaccination.

Level

of antibodies

Level needed toproduce immunity

Time/months

Use only the information provided to answer parts (i) and (ii).

(i) Give one reason why vaccinations for common illnesses aregiven to babies and young children many months before they arelikely to come in contact with infections.

[1]

(ii) What is the evidence that vaccinations provide long-termprotection?

[1]

(b) Colin got the flu vaccination in September. He gets infected with theflu virus in February. Explain how the vaccination stops him getting ill.

[4]


3/12

7470 3 [Turn over

Examiner Only

Marks Remark (c) (i) Travellers to certain foreign countries have to get a number of

travel vaccinations before they travel.

Explain why these travel vaccinations are necessary.

[2]

(ii) Name the type of immunity that travel vaccinations provide.

[1]


4/12

7470 4 [Turn over

Examiner Only

Marks Remark2 (a) Zebra mussels are an example of a competitive invasive species.

They have spread across most of the major waterways in NorthernIreland and are damaging natural habitats. Zebra mussels wereaccidentally introduced into Ireland as a result of human activity. Theyproduce a sticky substance that allows them to attach to hard objectssuch as rocks and the bottom of boats.

(i) Suggest one way that man has helped zebra mussels spread toIreland.

[1]

(ii) Name one other competitive invasive species.

[1]

(iii) State two characteristics of competitive invasive species.

[2]

(b) We can monitor the health of the environment by using abiotic andbiotic information.

(i) What is meant by a biotic factor?

[1]

(ii) Name one organism that can be used to monitor pollution levels.

[1]

Crown Copyright Department of the Environment http://archive.nics.gov.uk/env/050701b-env.htm


5/12

7470 5 [Turn over

Examiner Only

Marks Remark3 (a) The following graph shows trends for smoking and lung cancer in

men between 1960 and 2010.

smokers

lungcancer

1960 1970 1980

Year

1990 2000 2010

Number

(i) Suggest one reason why the number of men smoking has fallenin recent years.

[1]

(ii) Over 80% of the men who got lung cancer smoked tobacco.Suggest one reason why a non-smoker could get lung cancer.

[1]

(iii) Name one other lung disease caused by smoking.

[1]

(b) In an effort to reduce the harm caused by alcohol the Government

relaxed the law on closing times for bars and clubs. Many remainopen much later than they used to and the bars and clubs in a citycentre do not all close at the same time.

Suggest one reason how this could help reduce the harm caused byalcohol.

[1]


6/12

7470 6 [Turn over

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Marks Remark4 (a) The table below shows the number and average weight of fish caught

by one boat in 2000 and 2010.

Year Number/thousandsAverage weight/

kg

2000 13.7 0.67

2010 9.8 0.96

(i) Calculate the increase in the average weight of fish caught from2000 to 2010.

kg [1]

(ii) Suggest a reason for this change.

[1]

(iii) Use the information to suggest why the fishermen are able tomake as much profit in 2010 as in 2000 even though they caughtfewer fish.

[1]

(b) We need to maintain world food stocks to feed an increasing humanpopulation.

Give two reasons why the human population is increasing.

[2]


7/12

7470 7 [Turn over

Examiner Only

Marks Remark5 (a) Complete the carbon cycle showing how the processes of

photosynthesis, respiration, fossilisation and combustion remove andadd carbon dioxide to the air.

Carbon dioxidein the air

[3]

(b) Global warming occurs because the carbon cycle has becomeunbalanced over the last 150 years leading to a rise in atmosphericlevels of carbon dioxide.

Give two reasons why the carbon cycle has become unbalanced.

[2]


8/12

7470 8 [Turn over

Examiner Only

Marks Remark (c) Complete the diagram below to show how rising carbon dioxide levels

cause global warming.

Earth

Sun

Atmosphere

[1]

(d) The Kyoto protocol (1997) was an international agreement aimed atslowing down global warming.

Give one reason why another agreement is necessary to replace theKyoto protocol.

[1]

CCEA GCSE Single Award Science by A McFarland, C Murphy & J Napier, page 38, published by Hodder Education, 2009. ISBN 9780340974728. Reproduced by permission of Hodder Education.


9/12

7470 -9 [Turn over

Examiner Only

Marks Remark6 (a) The-picture-below-shows-a-group-of-animal-rights-protesters.

- - (i) Name-the-stages-immediately-before-and-immediately-after-animal-testing-in-drug-development.

- - - Before-______________________-After-______________________-[1]

- - (ii) Apart-from-ethical-considerations,-give- one -advantage-and- one -disadvantage-of-using-animals-in-drug-development.

- - - -_________________________________________________________

- - - -_________________________________________________________

- - - -_______________________________________________________ [2]

- - (iii) Give- one -alternative-to-animal-testing.

- - - -_______________________________________________________ [1]

- (b) With-progress-in-the-genetic-profiling-of-humans-(working-out-each-individuals-unique-DNA--a-sophisticated-and-costly-process)-it-will-

soon-be-possible-to-tailor-drug-treatment-to-individual-patients.-This-will-mean-that-the-types-and-strengths-of-drugs-used-will-be-unique-to-individual-patients,-i.e.-designer-drugs.-

- - Suggest- one -advantage-and- one -disadvantage-of-designer-drugs.

- - Advantage--___________________________________________________

- - -_____________________________________________________________

- - Disadvantage--________________________________________________

- - -___________________________________________________________ [2]

Alex Macnaughton / Rex Features Ltd


10/12

7470 -10 [Turn over

Examiner Only

Marks Remark7 The-following-graph-shows-the-effects-of-an-antibiotic-on-the-number-of-

bacteria-growing-in-a-Petri-dish.

A

Time/days

B

Number of bacteria

antibioticadded

antibioticadded

- The-same-type-and-strength-of-antibiotic-was-added-to-the-Petri-dish-at-times-A-and-B.

- (a) What-is-the-evidence-that-a-very-small-percentage-of-the-bacteria-were-antibiotic-resistant-at-the-start-of-the-experiment?

- - -

- - - [1]

- (b) How-does-the-graph-demonstrate:

- - (i) natural-selection?-

- - - -

- - - - [2]

- - (ii)- evolution?

- - - -

- - - - [2]


11/12

7470 11 [Turn over

Examiner Only

Marks Remark (c) When carrying out experiments on bacteria it is important to use

aseptic technique.

A

wireloop Petri

dish Bunsenburner

The apparatus in the diagram above is used to transfer bacteria fromculture bottle A to the Petri dish. State three things you would doduring the transfer to avoid contamination.

[3]

THIS IS THE END OF THE QUESTION PAPER


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Permission to reproduce all copyright material has been applied for.In some cases, efforts to contact copyright holders may have been unsuccessful and CCEAwill be happy to rectify any omissions of acknowledgement in future if notified.

112804

GCSE SCI Single Award PP March 2012 Higher Tier Module 2 Human Activity and Health 10526

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